Update WooThemes.com extension category archive links.
Fixed constant value cropping to option setting

I don’t think that it is the right way to set the cropping by checking
if the ‚crop’ option is set because it could have been set to 0 in the
options. In that case it would be cropped either way because isset
would also return true.
Merge conflict
Removed GMT
[2.2] Fixed POST/PUT products attributes values, closes #6600
Use current user ID for refunds. Closes #6598
Allow API edit_product method to update post_name (slug)

Closes #6601
Add fallbacks for wp_get_referer()

Closes #6609
Optimise paypal gateway, and revise encoding.

#5798
Decode redirect URL only when needed to prevent PayPal issues

Fixes #5798
esc_url_raw, huh. What is it good for. Absolutely nuthin #5798
[2.2] Low stock report should hide no stock

Closes #6611
[2.2] Fixed nonce check in form handler
Avoid notices if file does not exist

1. I've got notices on files
my-theme/woocommerce/single-product\add-to-cart\bundle.php,
my-theme/woocommerce/single-product\bundled-item-image.php,
my-theme/woocommerce/single-product\bundled-item-title.php
which are Template Overrides (WooCommerce Product Bundles)
and do not exist in the WC plugin.

2. There should be a more elegant way, because this is just to shut up notices. No version comparison performed.
Allow to filter empty tax rate code
[2.2] fixed the value format in stock field with wc_stock_amount(), closes #6622
[2.2] Remove strtolower and capitalize status names

Fixes #6624
Readme and version
Merge branch '2.2' of https://github.com/woothemes/woocommerce into 2.2

Conflicts:
	readme.txt